Heating apparatus for incubators.



L. N. PORTER.

HEATING APrARATUs PoR INGUBATORS. APPLICATION FILED SEPT. 30, 1911.

LGMAQLL Patented Dc. 17', 1912.

2 SHEETS-SHBET 1.

lnventr by 'l' Atto-rheys L. N.. PORTER.

HEATING APPARATUS lPOR INCUBATORSz APPLIOATION FILED SEPT. 30, 1911.

Patented Deo. 17, 1912.

2 SHEETS-SHEET 2.

inventor Attorneys Witnesses UNITED sTATEs gPATENT oFFreE.

LOUIS NATHAN PORTER, 0F BLAIR, NEBRASKA, ASSIGNOR OF ONE-HALF T JOHN A. MCKTFVVN, OF`IBLAIR, NEBRASKA.

HEATING APPARATUS FOR INCUBA'IORS.

Specification of Letters Patent.

Application filed September 30, 1911.

Patented Dec. 17, 1912.

Serial No.` 652.131.

. To all 'whom it may concern:

State of Nebraska, have invented a new and useful Heating ApparatusA for Incubators, of which the following is a speciticatlon.

This invention relates to incubators and more particularly to means for heating the v same.

One of the objects of the invention is `to provide a radiator which is movably mounted within the body of the incubator and is adapted to swing upwardlywiththe incubator top or lid or when the same is opened, there being a regulator upon the lower or inner face of the lid and which includes a lever constituting means not only for shifting the ame regulator but also means for holding the radiator so that it will move upwardly out of the way when the lid or top is swung open.

,lfVith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the. combination and arrangement of parts and in the details of construction hereinafter described, it being understood that changes in -the precise embodiment of the invention herein disclosed can lbe made within the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings the preferred form of shown.

In said drawings :-Figure 1 is a central vertical section through the incubator, one of the positions of the radiator and the incubator top being indicated by dotted lines. Fig. 2 is a section on line A- B Fig. 1. Fig. 3 is an enlarged section on `line C-D Fig. 1. Fig. 4 is a central transverse section through the radiator and showing the adjacent portions of the wall of the incubator. Fig. 5 is a perspective view of a portion of the heater and itsnregulating mechanism.

Referring to the figures by characters .of reference `il designates an incubator casing mounted on suitable supports 2, this casing being preferably cylindrical, although itis to be understood that the same can be of any lother `form desired. A shelf 3 is preferably arranged below the casing 1 and supports a heatinglamp 4 provided with any suitable flame regulating means indicated generally the invention has been at 5, said means being under the control of a rod 6 which extends upwardly into the casing 1. Said regulating means includes an arm having a weight 5 at one end wheres by 'said arm is held with its other end normally elevated, as shown in Fig. 1. This elevated end is 'adapted to be. engaged and depressed by the rod 6. Inasmuch as this regulating means constitutes no part of the l present lnventlon 1t 1s not deemed necessary further to describe and illustrate the same in detail.

The incubator casing has atop or cover 7 hingedly connected thereto, as at and a hanger 9 extends downwardly frdm this cover adjacent the front thereof and has a lever 10 pivotally connected to it. Said lever is held normally substantially parallel `with the top 7, a supporting and guiding loop 11 being provided for this purpose. Said loop extends from the top 7 and is fixedly connected to it. A thermostat 12 is preferably connected to the cover 7 by means of a hanger 13 xedly attached to said cover or top and a rod 14 connects said thermostat to the lever 10 so that, when the thermostat is expanded therod 14 will press downwardly on le'ver 10 whereas, when the thermostat contracts, it will lift the lever 10. It is to be understood that under normal conditions the lever 10 is out of contact with the loop 11. Lever 10 normally bears upon -the upper end of the rod 6 so that, when said lever is pushed downwardly by the expand- -ing thermostat, rod 6 will also-be pushed downwardly and will .operate the ame controlling means 5 so as to reduce the size 0f fthe flame and correspondinglydiminish the tube 18 and which serve to support'the feed tube 15 ixedly in position. Tube 18 extends throughout the height of the tube 15 and an' annularair passage 20 is thus formed between the two tubes. .An outer tube 21 surrounds and is spaced from tube 18, thus forming an air jacket about the tube 18,

An egg tray 22 isk mounted within the casing 1 and has a central opening through which the tubes 15, 18, and 21 project. A flange 23 preferably extends upwardly from the tray 22 and around the central opening. This flange is spaced from the tube 21, as shown particularly in Fig. 1. The egg tray can be of any preferred construction and in the drawings it has been shown made `up of a ring 24 having a concave, coarse wire fabric 25 secured thereon.

A radiator is mounted within the upper portion of the casing 1 and is preferably rectangular, as indicated in Fig. 2, said radiator consisting of front and rear tubes 26 and side tubes 27, the ends of the tubes 26 opening into the ends of the tubes 27 and all of the said tubes being ixedly connected so as to form a rigid structure. Trunnions 28 extend from the rear corner portions of the radiator yand are journaled within brackets 29 secured upon the inner surface of the wall of the casing 1.

Outlet tubes 30 extend laterally from the centers of the side tubes 27 and are of lessdiameter than said tubes 27, these outlet tubes normally resting innotches or slots 32 formed in the wall of casing 1 at diametrically opposed points. These slots 32 extend into said wall from the upper end thereof and are adapted to be closed by the lid or cover 7. The tubes 30 do not completelyll the slots 32 but, instead, sufficient spaces are formed above and around said tubes to permit vitiat-ed air to freely escape therethrough. This has been clearly shown in Fig. 4.

A hood 33 is arranged at the center of the radiator and the upper portion of this hood is connected to the center portions of the front and 'back tubes 26, by tubes 34 which are integral with the hood and with the tubes 26. Said tubes 34 are tapered toward the hood and the inlet ends thereof are considerably less in diameter than the tubes 26. Thesel connecting tubes 34 serve to support the hood 33 fixed relative tothe tubes 26 and 27 and the lower or open end of the hood normally extends around the' reduced or tapered end 17 of the tube 15. When the radiator is in its normal position, as indicated in F ig. 1, the lever 10 extends thereunder but out of contact therewith.

The top or cover 7 is 'preferably provided with an opening 35 closed by spaced plates 36 of glass whereby the contents of the incubator can be readily viewed at all tim-es. A door 37 may be provided in the lower portion of casingA 1 so that access may be had conveniently to the interior of the casing below the tray 22. v

It will be obvious that when the parts are assembled as indicated in Fig. 1, the heat arising from the lamp chimney 16 will pass into the tube 15, and thence into lmod 33.

Fromthis hood the hot gases will How into the tapered tubes 34 and will circulate throughI tubes 26 and 27 to the reduced tubes 30 from which they will be discharged into the external atmosphere. By providing tubes 26 and 27 having their diameters 0 greater than the diameters of the tubes 30 and of the inlet ends of tubes 34, the circulation of the hot gases within the tubes 26 and 27 is retarded and the eliiciency of the radiator thus materially increased. Fresh air is'free to flow upwardly into the casing 1 between the tubes 15 and 18 and, during its movement through passage 20, will be heated by the tube 15. When it is desired to turn the eggs, the top or cover 7 may be 80 swung open and lever 10 will thus be brought into contact with the radiator and will be swung downwardly until stopped by the loop 11. Said lever will then operate to swing the radiator upwardly about the. axis of th-e trunnions 28, thus lifting the tubes 30 out ofthe slots 32. The radiator will thusbe moved out of the way of the operator and the eggs can be conveniently reached. By lowering the cover 7 to closed' 90 position, the radiator will be guided back to its initial position, hood 33 moving into engagement with the upper end of the tube 15 and lever 10 reassuming its position upon the upper end of rod 6. When the lever is in this position it is supported out of con- 4tact both with the radiator and ,with the loop 11. The actuation of the lever by the thermostat 12 will not, therefore, be interfered with.

Instead of dependingv upon the thermostatically controlled parts for lifting the radiator when the top of the incubator is raised, any suitable hanger may be extended downwardly from the top 7 and engage the 105 radiator so asv to ,insure the upwardmovement thereof when the cover is raised.

What is claimed is 1. In an incubator, the combination with a casing, a heater, llame controlling means,

,and means for conducting heated air intothe easing from the heater, of a closure movably connected to the casing, a thermostat supported thereby and movable therewith,l and means shiftable with the thermostat into vand out of engagement with the flame controlling means of the heater during the closing and opening'respectively of the closure, for regulating the heat.

2. In an incubator the combination with a casing, 'a heater having flame controlling means, and means for conducting hot air from the heater and into the incubator casing, of a hinged closure, a thermostat supported by and movable with the closure, a 125 level' supported "upon and movable with the closure and adapted to be actuated by theU thermostat', and means for' transmitting motion from said lever to the flame l-eguiatmg means of the heater, said lever being mov- 3. ln an incubator, the combination witha Casing yand a heateondncting tube extend'- lng?, theeino, of al indiaan' meludinga hood ,removably engaging said mbe? millet tubes,

and lunnions, said @minions pvotally en- Elie easing' and the oublie-5 tubes deng', said. `outlet annons eope'ating *Lo hold the radiator noimally in 'position ,vith its hood engaging the beat oon/lading tube, a hinged cover, a blieii'nestaically controlled 'leve/i? sonnen-ized thereto and extending under the i'adiatoi, flame efgmsiolling means' actuated by the' levez2 means for liifniting.V the movement of 'die lever i'elative to 'the cover, said lever coi iii/ating means foi' engaging he radiate? "io swing il; upwardly wien the @over is opened ll. ln an incubator, the combination with a Casing and Va heat conducting' tube extending tlieeinqbf a pivofted radiator wit-hin the easing", said radiator normally communicating' with the tube, a hinged Cover, a thermostatically Controlled lever connected to and movable with the Cover, said levei1 extending undei1 the radiator, flame controlling means actuated by the lever, and means foi limiting ille movement of the lever away from the eovei, said lever operatingV to engage and elevate the radiator when. the cover is raised.

In testimony that I claim the foregoil/ig as my own, have hereto aixed my signature in tbe presence of two Witnesses.

LUUIS NATHAN PORTER.

Witnesses OSCAR DDioN9 Jnssm L. DIXON. 

